Power device and electrical appliance

ABSTRACT

A power device for an electrical applicant, such as, a household air conditioner, is provided. The power device has a control input terminal, a first driving circuit, and a second driving circuit. When the control input terminal inputs a low level, the first driving circuit and the second driving circuit output high and low level signals in a first voltage range. When the control input terminal inputs a high level, the first driving circuit and the second driving circuit output high and low level signals in a second voltage range. The first voltage range is different from the second voltage range.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a continuation application of PCTInternational Application No. PCT/CN2019/111067, filed on Oct. 14, 2019,which claims priority to and the benefit of the Chinese PatentApplication No. “201910208191.3” filed on Mar. 19, 2019, the entirecontent of which is incorporated herein by reference for all purposes.No new matter has been introduced.

FIELD

The present disclosure relates to the field of the electric appliancetechnology, in particular relates to a power device and an electricappliance including the power device.

BACKGROUND

An Intelligent Power Module (hereinafter “IPM” for abbreviation) is apower drive product (i.e., a power device) that combines the powerelectronic technology and the integrated circuit technology. The IPMintegrates a power switch device (e.g., a silicon carbide (SiC) deviceor a silicon (Si) device) with a High Voltage Integrated Circuit(hereinafter “HVIC” for abbreviation), and includes fault detectingcircuits for overvoltage, overcurrent, overheating and the like. On onehand, the IPM receives a control signal of a Micro Controller Unit(hereinafter “MCU” for abbreviation) for driving a subsequent circuit towork, and on the other hand the IPM sends a system status detectingsignal back to the MCU. Compared to the traditional discrete solution,the IPM has won an increasingly large market due to their advantages ofhigh integration and high reliability, and especially is suitable for afrequency converter and various inverter power supplies of a drivingmotor, thus being an ideal power electronic device for frequencyconversion speed regulation, metallurgical machinery, electric traction,servo drive, and frequency conversion household appliances.

In practical applications, with an increasing demand on system energyconsumption, especially in the air conditioning industry, powerconsumption of the intelligent power module has become a main source ofthe power consumption for variable frequency electronic control of aninverter air conditioner. Accordingly, how to reduce the powerconsumption of the intelligent power module has become an importanttopic affecting the further promotion and application of the intelligentpower module and even the inverter air conditioner. Replacing a Sidevice with a SiC device is an effective way to reduce the powerconsumption of the intelligent power module, which however also brings anew problem due to different threshold voltages between the SiC deviceand the Si device where the SiC device is generally of a thresholdvoltage higher than the Si device. If the SiC device is driven by thesame HVIC as the Si device, it will inevitably lead to incompleteconduction of the SiC device, thus it is impossible to take theadvantage of the low power consumption by the SiC device, even with anopposite effect reached. On the other hand, if the SiC device is drivenby a different HVIC from the Si device, it will cause a difficulty inmaterial organization in the production process with a risk wherematerials are mixed existing, thus increasing the cost of theintelligent power module accordingly. In addition, if the HVIC drivingthe SiC device is provided with a higher voltage for power supply, itwill inevitably cause an increase of the power consumption of the entireintelligent power module, which will offset the reduced powerconsumption by the SiC device, thus eliminating the advantage of thereduced power consumption by using the IPM including the SiC device. Onthe other hand, if the HVIC driving the SiC device is provided with thehigher voltage for power supply, a peripheral electronic control schememust be modified, which will undoubtedly increase resistance to theintelligent power module equipped with the SiC device.

SUMMARY

The present disclosure and certain embodiments thereof provide a powerdevice, including a control input terminal, an upper bridge arm switchtube and a lower bridge arm switch tube, a first driving circuit whichis connected to the control input terminal and configured to drive theupper bridge arm switch tube; and a second driving circuit which isconnected to the control input terminal and configured to drive thelower bridge arm switch tube, wherein the control input terminal isconnectable with a low level or a high level, when the control inputterminal is connected with the low level, the first driving circuit andthe second driving circuit output a high/low level signal in a firstvoltage range, and when the control input terminal is connected with thehigh level, the first driving circuit and the second driving circuitoutput a high/low level signal in a second voltage range, wherein thefirst voltage range is different from the second voltage range.

The present disclosure and certain embodiments thereof provide anelectric appliance including a power device and a processor connected tothe power device. The power device includes a control input terminal, anupper bridge arm switch tube and a lower bridge arm switch tube, a firstdriving circuit which is connected to the control input terminal andconfigured to drive the upper bridge arm switch tube; and a seconddriving circuit which is connected to the control input terminal andconfigured to drive the lower bridge arm switch tube, wherein thecontrol input terminal is connectable with a low level or a high level,when the control input terminal is connected with the low level, thefirst driving circuit and the second driving circuit output a high/lowlevel signal in a first voltage range, and when the control inputterminal is connected with the high level, the first driving circuit andthe second driving circuit output a high/low level signal in a secondvoltage range, wherein the first voltage range is different from thesecond voltage range.

According to certain embodiments of the present disclosure, the powerdevice and the electric device can output the high/low level signals indifferent voltage ranges without changing the external input voltage tomeet the requirements of different types of devices, such as the SiCdevice and the Si device, where respective conduction processes of thedifferent types of the devices all are in full conduction state withindividual performances fully achieved. In addition, the first drivingcircuit and the second driving circuit that are shared for the SiCdevice and the Si device are used for achieving output of the high/lowlevels in different voltage ranges, such that the risk where materialsare mixed is avoided in the process of producing the power device, thusfacilitating material organization and reduction of material costs.

The additional aspects and advantages of the present disclosure will begiven below, part of which will become obvious from the followingdescription, or be understood through the practice of the presentdisclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the presentdisclosure will become obvious and understandable with the followingdescription for embodiments by combining the accompanying drawings.

FIG. 1 is a circuit structure diagram showing a power device accordingto an embodiment of the present disclosure;

FIG. 2 is a schematic diagram showing a power device in which a controlinput terminal is connected to a power supply or ground through abonding wire according to an embodiment of the present disclosure;

FIGS. 3-7 each are a schematic diagram showing a switch tube accordingto certain embodiments of the present disclosure;

FIG. 8 is a schematic diagram showing a UH driving circuit according toan embodiment of the present disclosure;

FIG. 9 is a schematic diagram showing a VH driving circuit according toan embodiment of the present disclosure;

FIG. 10 is a schematic diagram showing a WH driving circuit according toan embodiment of the present disclosure;

FIG. 11 is a schematic diagram showing a UL/VL/WL driving circuitaccording to an embodiment of the present disclosure; and

FIG. 12 is a block diagram showing an electric appliance according to anembodiment of the present disclosure.

DETAILED DESCRIPTION

Reference will be made in detail to embodiments of the presentdisclosure. The same or similar elements and the elements having same orsimilar functions are denoted by like reference numerals throughout thedescriptions. The embodiments described herein with reference todrawings are explanatory, illustrative, and used to generally understandthe present disclosure. The embodiments shall not be construed to limitthe present disclosure.

In the specification, it should be understood that, the terms indicatingorientation or position relationship such as “central”, “longitudinal”,“lateral”, “width”, “thickness”, “above”, “below”, “front”, “rear”,“right”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “inner”,“outer”, “clockwise”, “counter-clockwise” should be construed to referto the orientation or position relationship as then described or asshown in the drawings. These terms are merely for convenience andconcision of description and do not alone indicate or imply that thedevice or element referred to must have a particular orientation or mustbe configured or operated in a particular orientation. Thus, it cannotbe understood to limit the present disclosure. In addition, terms suchas “first” and “second” are used herein for purposes of description andare not intended to indicate or imply relative importance orsignificance or impliedly indicate quantity of the technical featurereferred to. Thus, the feature defined with “first” and “second” maycomprise one or more these features. In the description of the presentdisclosure, “a plurality of” means two or more than two this features,unless specified otherwise.

In description of the present disclosure, it should be noted that unlessspecified or limited otherwise, the terms “mounted”, “connected”,“coupled” should be understood broadly, and may be, for example, fixedconnections, detachable connections, or integrated connections; may alsobe mechanical or electrical connections; may also be direct connectionsor indirect connections via intervening structures; may also be innercommunications of two elements or mutual interaction between twoelements, which can be understood by those skilled in the art accordingto specific situations.

With reference to FIG. 1, in an embodiment of the present disclosure, apower device 100 includes a control input terminal 12, an upper bridgearm switch tube 22, a lower bridge arm switch tube 24, a first drivingcircuit 14, and a second driving circuit 16. The first driving circuit14 is connected to the control input terminal 12 and configured to drivethe upper bridge arm switch tube 22. The second driving circuit 16 isconnected to the control input terminal 12 and configured to drive thelower bridge arm switch tube 24. The control input terminal 12 isconnectable with a low level or a high level. When the control inputterminal 12 is connected with the low level, the first driving circuit14 and the second driving circuit 16 output a high/low level signal in afirst voltage range, and when the control input terminal 12 is connectedwith the high level, the first driving circuit 14 and the second drivingcircuit 16 output a high/low level signal in a second voltage range,where the first voltage range is different from the second voltagerange.

With reference to FIG. 1, the first driving circuit 14 includes a UHdriving circuit 142, a VH driving circuit 144 and a WH driving circuit146; the second driving circuit 16 includes a UL/VL/WL driving circuit162; the first driving circuit 14 and the second driving circuit 16 areintegrated inside a high voltage integrated circuit (HVIC) tube 10. TheVCC terminal of the HVIC tube 10 is configured to serve as a low-voltagearea power supply positive terminal VDD of the power device 100, wherethe VDD is normally 15 V. Inside the HVIC tube 10, the VCC terminal isconnected to respective power supply positive terminals of the UHdriving circuit 142, the VH driving circuit 144, the WH driving circuit146 and the UL/VL/WL driving circuit 162.

In this embodiment, the UH driving circuit 142, the VH driving circuit144, the WH driving circuit 146 and the UL/VL/WL driving circuit 162each may be a driving circuit inside the electric appliance, for examplemay be a three-phase driving circuit for a compressor of an airconditioner, where the UH driving circuit 142 is connected to the ULdriving circuit, the VH driving circuit 144 is connected to the VLdriving circuit, and the WH driving circuit 146 is connected to the WLdriving circuit.

The HIN1 terminal of the HVIC tube 10 is configured to serve as aU-phase upper bridge arm input terminal UHIN of the power device 100,and is connected to the input terminal of the UH driving circuit 142inside the HVIC tube 10. The HIN2 terminal of the HVIC tube 10 isconfigured to serve as a V-phase upper bridge arm input terminal VHIN ofthe power device 100, and is connected to the input terminal of the VHdriving circuit 144 inside the HVIC tube 10. The HIN3 terminal of theHVIC tube 10 is configured to serve as a W-phase upper bridge arm inputterminal WHIN of the power device 100, and is connected to the inputterminal of the WH driving circuit 146 inside the HVIC tube 10.

The LIN1 terminal of the HVIC tube 10 is configured to serve as aU-phase lower bridge arm input terminal ULIN of the power device 100,and is connected to the first input terminal of the UL/VL/WL drivingcircuit 162 inside the HVIC tube 10. The LIN2 terminal of the HVIC tube10 is configured to serve as a V-phase lower bridge arm input terminalVLIN of the power device 100, and is connected to the second inputterminal of the UL/VL/WL driving circuit 162 inside the HVIC tube 10.The LIN3 terminal of the HVIC tube 10 is configured to serve as aW-phase lower bridge arm input terminal WLIN of the power device 100,and is connected to the third input terminal of the UL/VL/WL drivingcircuit 162 inside the HVIC tube 10. Here, the six input terminals ofthe U, V and W-phases of the power device 100 are configured to receive0V or 5V input signals.

The GND terminal of the HVIC tube 10 is configured to serve as alow-voltage area power supply negative terminal COM of the power device100, and is connected to respective power supply negative terminals ofthe UH driving circuit 142, the VH driving circuit 144, the WH drivingcircuit 146 and the UL/VL/WL driving circuit 162.

The upper bridge arm switch tube 22 includes a first upper bridge armswitch tube 222, a second upper bridge arm switch tube 224, and a thirdupper bridge arm switch tube 226. The lower bridge arm switch tube 24includes a first lower bridge arm switch tube 242, a second lower bridgearm switch tube 244, and a third lower bridge arm switch tube 246.

The VB1 terminal of the HVIC tube 10 is connected to a high-voltage areapower supply positive terminal of the UH driving circuit 142 inside theHVIC tube 10, is connected to one end of the first capacitor 32 outsideof the HVIC tube 10, and is configured to serve as a U-phasehigh-voltage area power supply positive terminal UVB of the power device100. The HO1 terminal of the HVIC tube 10 is connected to the outputterminal of the UH driving circuit 142 inside the HVIC tube 10, and isconnected to the control electrode of the U-phase first upper bridge armswitch tube 222 outside the HVIC tube 10. The VS1 terminal of the HVICtube 10 is connected to a high-voltage area power supply negativeterminal of the UH driving circuit 142 inside the HVIC tube 10, isconnected to the output negative electrode of the U-phase first upperbridge arm switch tube 222, the output positive electrode of the U-phasefirst lower bridge arm switch tube 242 and the other end of the firstcapacitor 32 outside of the HVIC tube 10, and is configured to serve asa U-phase high-voltage area power supply negative terminal UVS of thepower device 100.

The VB2 terminal of the HVIC tube 10 is connected to a high-voltage areapower supply positive terminal of the VH driving circuit 144 inside theHVIC tube 10, is connected to one end of the second capacitor 34 outsideof the HVIC tube 10, and is configured to serve as a V-phasehigh-voltage area power supply positive terminal VVB of the power device100. The HO2 terminal of the HVIC tube 10 is connected to the outputterminal of the VH driving circuit 144 inside the HVIC tube 10, and isconnected to the control electrode of the V-phase second upper bridgearm switch tube 224 outside the HVIC tube 10. The VS2 terminal of theHVIC tube 10 is connected to a high-voltage area power supply negativeterminal of the VH driving circuit 144 inside the HVIC tube 10, isconnected to an output negative electrode of the second upper bridge armswitch tube 224, an output positive electrode of the V-phase secondlower bridge arm switch tube 244 and the other end of the secondcapacitor 34 outside of the HVIC tube 10, and is configured to serve asa V-phase high-voltage area power supply negative terminal VVS of thepower device 100.

The VB3 terminal of the HVIC tube 10 is connected to a high-voltage areapower supply positive terminal of the WH driving circuit 146 inside theHVIC tube 10, is connected to one end of the third capacitor 36 outsideof the HVIC tube 10, and is configured to serve as a W-phasehigh-voltage area power supply positive terminal WVB of the power device100. The HO3 terminal of the HVIC tube 10 is connected to the outputterminal of the WH driving circuit 146 inside the HVIC tube 10, and isconnected to the control electrode of the W-phase third upper bridge armswitch tube 226 outside the HVIC tube 10. The VS3 terminal of the HVICtube 10 is connected to a high-voltage area power supply negativeterminal of the WH driving circuit 146 inside the HVIC tube 10, isconnected to an output negative electrode of the switch tube 226, anoutput positive electrode of the W-phase third lower bridge arm switchtube 246 and the other end of the third capacitor 36 outside of the HVICtube 10, and is configured to serve as a W-phase high-voltage area powersupply negative terminal WVS of the power device 100.

The LO1 terminal of the HVIC tube 10 is connected to the controlelectrode of the U-phase first lower bridge arm switch tube 242; the LO2terminal of the HVIC tube 10 is connected to the control electrode ofthe V-phase second lower bridge arm switch tube 244; and the LO3terminal of the HVIC tube 10 is connected to the control electrode ofthe W-phase third lower bridge arm switch tube 246. An output negativeelectrode of the U-phase first lower bridge arm switch tube 242 isconfigured to serve as a U-phase low-voltage reference terminal UN ofthe power device 100. An output negative electrode of the V-phase secondlower bridge arm switch tube 244 is configured to serve as a V-phaselow-voltage reference terminal VN of the power device 100. An outputnegative electrode of the W-phase third lower bridge arm switch tube 246is configured to serve as a W-phase low-voltage reference terminal WN ofthe power device 100.

An output positive electrode of the U-phase first upper bridge armswitch tube 222, an output positive electrode of the V-phase secondupper bridge arm switch tube 224, and an output positive electrode ofthe W-phase third upper bridge arm switch tube 226 are connected andconfigured to serve as a high-voltage input terminal P of the powerdevice 100, where P is normally 300 V. In an example, the voltage of thepower supply of VDD is 20 V.

The function of the HVIC tube 10 includes the following.

1. When the control input terminal 12 is connected with a low level, HO1to HO3 and LO1 to LO3 output high/low level signals at 0 V to 20 V. Inother words, when the control input terminal 12 is connected with thelow level, the UH driving circuit 142, the VH driving circuit 144, theWH driving circuit 146 and the UL/VL/WL driving circuit 162 output thehigh/low level signals in a first voltage range. In an example, thefirst voltage range may be 0 V to 20 V.

2. When the control input terminal 12 is connected with a high level,HO1 to HO3 and LO1 to LO3 output high/low level signals at 0 V to 15 V.In other words, when the control input terminal 12 is connected with thehigh level, the UH driving circuit 142, the VH driving circuit 144, theWH driving circuit 146 and the UL/VL/WL driving circuit 162 output thehigh/low level signals in a second voltage range. In an example, thesecond voltage range may be 0 V to 15 V.

In some embodiments, with reference to FIG. 2, when the first upperbridge arm switch tube 222, the second upper bridge arm switch tube 224,the third upper bridge arm switch tube 226, the first lower bridge armswitch tube 242, the second lower bridge arm switch tube 244 and thethird lower bridge arm switch tube 246 each include an IGBT tube (the Sidevice is the Si IGBT tube 2222 as shown in FIGS. 3-4). For example,when the first upper bridge arm switch tube 222, the second upper bridgearm switch tube 224, the third upper bridge arm switch tube 226, thefirst lower bridge arm switch tube 242, the second lower bridge armswitch tube 244 and the third lower bridge arm switch tube 246 each arethe Si device, or when the first upper bridge arm switch tube 222, thesecond upper bridge arm switch tube 224, the third upper bridge armswitch tube 226, the first lower bridge arm switch tube 242, the secondlower bridge arm switch tube 244 and the third lower bridge arm switchtube 246 each are a combination of the Si device and the SiC device,inside the power device 100, the control input terminal 12 is connectedto the VCC terminal through a bonding wire 122, and the first drivingcircuit 14 and the second driving circuit 16 output the high/low levelsignal in the first voltage range.

When the first upper bridge arm switch tube 222, the second upper bridgearm switch tube 224, the third upper bridge arm switch tube 226, thefirst lower bridge arm switch tube 242, the second lower bridge armswitch tube 244 and the third lower bridge arm switch tube 246 eachinclude a SiC MOS tube (the SiC device is the SiC MOS tube 2222 as shownin FIGS. 5-7). For example, when the first upper bridge arm switch tube222, the second upper bridge arm switch tube 224, the third upper bridgearm switch tube 226, the first lower bridge arm switch tube 242, thesecond lower bridge arm switch tube 244 and the third lower bridge armswitch tube 246 each are the SiC device, or when the first upper bridgearm switch tube 222, the second upper bridge arm switch tube 224, thethird upper bridge arm switch tube 226, the first lower bridge armswitch tube 242, the second lower bridge arm switch tube 244 and thethird lower bridge arm switch tube 246 each are a combination of the SiCdevice and the Si device, inside the power device 100, the control inputterminal 12 is connected to the GND terminal through a bonding wire 122,and the first driving circuit 14 and the second driving circuit 16output the high/low level signal in the second voltage range.

With reference to FIG. 2, in an embodiment, the power device 100includes a first connecting portion 124, a second connecting portion 126and an SSS terminal. The first connecting portion 124 is configured toconnect the VCC terminal and the VDD terminal, and the second connectingportion 126 is configured to connect the GND terminal and the COMterminal. The SSS terminal is connected to the control input terminal12, and the SSS terminal is connected to the GND terminal through thebonding wire 122. The first connecting portion 124 and the secondconnecting portion 126 may be a guideline, an electrode and the like.

In addition, in some embodiments, the HVIC tube 10 is provided inside aswitch. The switch is connected to the GND terminal, the VCC terminaland the control input terminal 12, respectively, and configured tocontrol conduction between the control input terminal 12 and the VCCterminal or the GND terminal. For example, when the control inputterminal 12 needs to be connected with the low level, the control inputterminal 12 is connected to the GND terminal; and when the control inputterminal 12 needs to be connected with the high level, the control inputterminal 12 is connected to the VCC terminal.

In some embodiments, with reference to FIG. 1, the power device 100includes a controller (not shown). The control input terminal 12 isconnected to the controller through a bonding wire 122. The controlleris configured to output a high level or a low level. The controller mayinclude a digital circuit configured to output a high/low level, or mayalso include a trigger and the like, but not limited thereto. Forexample, the controller is configured to output a high level same as theVCC terminal, or output a low level same as the GND terminal, or outputother high level or low level according to actual needs. In addition,the controller may be installed inside the HVIC tube 10, for exampleinstalled between the control input terminal 12 and the SSS inputterminal or elsewhere. Alternatively, the controller may also beinstalled outside the HVIC tube 10, for example installed at a positionwhere is close to the control input terminal 12 or elsewhere.Alternative, the controller is installed on a microprocessor.

In an embodiment of the present disclosure, the first upper bridge armswitch tube 222, the second upper bridge arm switch tube 224, the thirdupper bridge arm switch tube 226, the first lower bridge arm switch tube242, the second lower bridge arm switch tube 244 and the third lowerbridge arm switch tube 246 each may be a combination of an InsulatedGate Bipolar Transistor (hereinafter “IGBT” for abbreviation) tube(i.e., the Si device) and a Fast Recovery Diode (hereinafter “FRD” forabbreviation) tube connected in parallel, or may be a combination of theIGBT tube and a SiC Schottky Barrier Diode (hereinafter “SBD” forabbreviation) tube, or may be a SiC Metal Oxide Semiconductor(hereinafter “MOS” for abbreviation) tube (i.e., the SiC device), or maybe a combination of the SiC MOS tube and the FRD tube, or may be acombination of the SiC MOS tube and the SiC SBD tube, which may beselected particularly according to actual needs, and thus will not belimited in particular hereby.

According to an embodiment of the present disclosure, when the firstupper bridge arm switch tube 222, the second upper bridge arm switchtube 224, the third upper bridge arm switch tube 226, the first lowerbridge arm switch tube 242, the second lower bridge arm switch tube 244and the third lower bridge arm switch tube 246 each are the SiC device,the control input terminal 12 is connected with a low level signal; andwhen the first upper bridge arm switch tube 222, the second upper bridgearm switch tube 224, the third upper bridge arm switch tube 226, thefirst lower bridge arm switch tube 242, the second lower bridge armswitch tube 244 and the third lower bridge arm switch tube 246 each arethe Si device, the control input terminal 12 is connected with a highlevel signal.

According to certain embodiments of the present disclosure, the powerdevice 100 can output the high/low level signals in different voltageranges without changing the external input voltage to meet therequirements of different types of devices, such as the SiC device andthe Si device, where respective conduction processes of the differenttypes of the devices all are in full conduction state with individualperformances achieved. In addition, the first driving circuit 14 and thesecond driving circuit 16 that are shared for the SiC device and the Sidevice are used for achieving output of the high/low levels in differentvoltage ranges, such that the risk where materials are mixed is avoidedin the process of producing the power device 100, thus facilitatingmaterial organization and reduction of material costs. Accordingly, thevoltage of the power supply for the power device 100 remains unchangedat 20 V, the peripheral circuit does not need to be modified, and thepower consumption of the HVIC tube 10 has not substantially increased.The same HVIC tube 10 is configured to drive both the SiC device and theSi device, such that the risk where materials are mixed is avoided inthe production process, thus facilitating material organization andreduction of material costs. The voltage used to drive the SiC device is20 V and the voltage used to drive the Si device is 15 V, such that therespective conduction processes of the SiC device and the Si device bothare in the full conduction state with individual performances achieved.The technical solution fully integrating the SiC power device with thetraditional Si power device plays an important role in upgrading of thepower device, promoting of the power device, and energy-saving of theinverter household appliance, especially the inverter air conditioner.

The present disclosure will be further described below in conjunctionwith certain embodiments.

FIGS. 3-7 are different combinations of the switch tubes. As the firstupper bridge arm switch tube 222, the second upper bridge arm switchtube 224, the third upper bridge arm switch tube 226, the first lowerbridge arm switch tube 242, the second lower bridge arm switch tube 244and the third lower bridge arm switch tube 246 have exactly the samestructure, the U-phase first upper bridge arm switch tube 222 is takenas an example for illustration.

FIG. 3 shows a combination of Si IGBT and Si FRD. The collector of theSi IGBT tube 2222 is connected to a cathode of the Si FRD tube 2224, andis configured to serve as the output positive electrode of the U-phasefirst upper bridge arm switch tube 222. The emitter of the Si IGBT tube2222 is connected to the anode of the Si FRD tube 2224, and isconfigured to serve as the output negative electrode of the U-phasefirst upper bridge arm switch tube 222. The gate of the Si IGBT tube2222 is configured to serve as the control electrode of the U-phasefirst upper bridge arm switch tube 222.

FIG. 4 shows a combination of Si IGBT and SiC SBD. The collector of theSi IGBT tube 2222 is connected to a cathode of the SiC SBD tube 2224,and is configured to serve as the output positive electrode of theU-phase first upper bridge arm switch tube 222. The emitter of the SiIGBT tube 2222 is connected to the anode of the SiC SBD tube 2224, andis configured to serve as the output negative electrode of the U-phasefirst upper bridge arm switch tube 222. The gate of the Si IGBT tube2222 is configured to serve as the control electrode of the U-phasefirst upper bridge arm switch tube 222.

FIG. 5 shows SiC MOS. The drain of the SiC MOS tube 2222 is configuredto serve as the output positive electrode of the U-phase first upperbridge arm switch tube 222. The source of the SiC MOS tube 2222 isconfigured to serve as the output negative electrode of the U-phasefirst upper bridge arm switch tube 222. The gate of the SiC MOS tube2222 is configured to serve as the control electrode of the U-phasefirst upper bridge arm switch tube 222.

FIG. 6 shows a combination of SiC MOS and Si FRD. The drain of the SiCMOS tube 2222 is connected to the cathode of the Si FRD tube 2224, andis configured to serve as the output positive electrode of the U-phasefirst upper bridge arm switch tube 222. The source of the SiC MOS tube2222 is connected to the anode of the Si FRD tube 2224, and isconfigured to serve as the output negative electrode of the U-phasefirst upper bridge arm switch tube 222. The gate of the SiC MOS tube2222 is configured to serve as the control electrode of the U-phasefirst upper bridge arm switch tube 222.

FIG. 7 shows a combination of SiC MOS and SiC SBD. The drain of the SiCMOS tube 2222 is connected to the cathode of the SiC SBD tube 2224, andis configured to serve as the output positive electrode of the U-phasefirst upper bridge arm switch tube 222. The source of the SiC MOS tube2222 is connected to the anode of the SiC SBD tube 2224, and isconfigured to serve as the output negative electrode of the U-phasefirst upper bridge arm switch tube 222. The gate of the Si IGBT tube2222 is configured to serve as the control electrode of the U-phasefirst upper bridge arm switch tube 222.

It would be understood that the second upper bridge arm switch tube 224may be any combination of the switch tubes as shown in FIGS. 3-7; thethird upper bridge arm switch tube 226 may be any combination of theswitch tubes as shown in FIGS. 3-7; the first lower bridge arm switchtube 242 may be any combination of the switch tubes as shown in FIGS.3-7; the second lower bridge arm switch tube 244 may be any combinationof the switch tubes as shown in FIGS. 3-7; and the third lower bridgearm switch tube 246 may be any combination of the switch tubes as shownin FIGS. 3-7.

In addition, the first upper bridge arm switch tube 222, the secondupper bridge arm switch tube 224, the third upper bridge arm switch tube226, the first lower bridge arm switch tube 242, the second lower bridgearm switch tube 244 and the third lower bridge arm switch tube 246having the exactly same structure refers to that, in the actual powerdevice 100, the first upper bridge arm switch tube 222, the second upperbridge arm switch tube 224, the third upper bridge arm switch tube 226,the first lower bridge arm switch tube 242, the second lower bridge armswitch tube 244 and the third lower bridge arm switch tube 246 each arethe switch tube of the combination of Si IGBT and Si FRD as shown inFIG. 3; or the first upper bridge arm switch tube 222, the second upperbridge arm switch tube 224, the third upper bridge arm switch tube 226,the first lower bridge arm switch tube 242, the second lower bridge armswitch tube 244 and the third lower bridge arm switch tube 246 each arethe switch tube of the combination of Si IGBT and SiC SBD as shown inFIG. 4; or the first upper bridge arm switch tube 222, the second upperbridge arm switch tube 224, the third upper bridge arm switch tube 226,the first lower bridge arm switch tube 242, the second lower bridge armswitch tube 244 and the third lower bridge arm switch tube 246 each arethe switch tube of SiC MOS as shown in FIG. 5; or the first upper bridgearm switch tube 222, the second upper bridge arm switch tube 224, thethird upper bridge arm switch tube 226, the first lower bridge armswitch tube 242, the second lower bridge arm switch tube 244 and thethird lower bridge arm switch tube 246 each are the switch tube of thecombination of SiC MOS and Si FRD as shown in FIG. 6; or the first upperbridge arm switch tube 222, the second upper bridge arm switch tube 224,the third upper bridge arm switch tube 226, the first lower bridge armswitch tube 242, the second lower bridge arm switch tube 244 and thethird lower bridge arm switch tube 246 each are the switch tube of thecombination of SiC MOS and SiC SBD as shown in FIG. 7.

FIGS. 8-10 show respective embodiments of the UH driving circuit 142,the VH driving circuit 144, and the WH driving circuit 146, and FIG. 11shows the structure of the UL/VL/WL driving circuit 162.

With reference to FIGS. 1 and 8, the UH driving circuit 142 includes: afirst input sub-circuit 1421, a first switch tube 1422, a second switchtube 1423, a third switch tube 1424, and a first voltage outputsub-circuit 1425. The first input sub-circuit 1421 is connected to thecontrol input terminal 12. The first input sub-circuit 1421 has a firstoutput terminal, a second output terminal and a third output terminal.When the control input terminal 12 is connected with the low level, thefirst output terminal and the second output terminal output triggerpulses; and when the control input terminal 12 is connected with thehigh level, the first output terminal, the second output terminal andthe third output terminal output trigger pulses.

The first switch tube 1422 is connected to the first output terminal,when the first output terminal outputs a trigger pulse, the first switchtube 1422 is turned on. The second switch tube 1423 is connected to thesecond output terminal, when the second output terminal outputs atrigger pulse, the second switch tube 1423 is turned on. The thirdswitch tube 1424 is connected to the third output terminal, when thethird output terminal outputs a trigger pulse, the third switch tube1424 is turned on.

The first voltage output sub-circuit 1425 is connected to the firstswitch tube 1422, the second switch tube 1423 and the third switch tube1424, respectively. When the control input terminal 12 is connected withthe low level, the high level signal is not present at the third outputterminal of the first input sub-circuit 1421, i.e., no trigger pulse ispresent, and the third switch tube 1424 is not turned on, at which timethe first voltage output sub-circuit 1425 outputs the high/low levelsignal in the first voltage range. When the control input terminal 12 isconnected with the high level, the high level pulse signal is present atthe third output terminal of the first input sub-circuit 1421, i.e., thetrigger pulse is present, and the third switch tube 1424 is turned onfor outputting the high/low level signal in the second voltage range.

Continue referring to FIG. 8, the first voltage output sub-circuit 1425includes: a latch circuit 1426, a latch and step-down circuit 1427, anda first switching module 1428.

The latch and step-down circuit 1427 is connected to the first switchtube 1422 and the second switch tube 1423. The first switching module1428 is connected to the latch and step-down circuit 1427 and the powersupply, respectively. The latch circuit 1426 is connected to the thirdswitch tube 1424. The latch circuit 1426 is configured to control thefirst switching module 1428: when the third switch tube 1424 is notturned on, the latch circuit 1426 is configured to control an action ofthe first switching module 1428 to take a voltage of the power supply asan output voltage of the output sub-circuit 1429; and when the thirdswitch tube 1424 is turned on, the latch circuit 1426 is configured tocontrol an action of the first switching module 1428 to take an outputvoltage of the latch and step-down circuit 1427 as an output voltage ofthe output sub-circuit 1429.

As shown in FIG. 8, inside the UH driving circuit 142, VCC is connectedto the positive terminal of the power supply of the first inputsub-circuit 1421; HIN1 is connected to the input terminal of the firstinput sub-circuit 1421; and the control input terminal 12 is connectedto the control terminal of the first input sub-circuit 1421. The firstoutput terminal of the first input sub-circuit 1421 is connected to thegate of the first switch tube (such as a high-voltage DMOS tube) 1422;the second output terminal of the first input sub-circuit 1421 isconnected to the gate of the second switch tube (such as a high-voltageDMOS tube) 1423; and the third output terminal of the first inputsub-circuit 1421 is connected to the gate of the third switch tube (suchas a high-voltage DMOS tube) 1424. The GND terminal is connected to thenegative terminal of the power supply of the first input sub-circuit1421, the substrate and the source of the first switch tube 1422, thesubstrate and the source of the second switch tube 1423, and thesubstrate and the source of the third switch tube 1424.

The drain of the first switch tube 1422 is connected to the first inputterminal of the latch and step-down circuit 1427, and the drain of thesecond switch tube 1423 is connected to the second input terminal of thelatch and step-down circuit 1427. The first output terminal of the latchand step-down circuit 1427 is connected to the 1 selection terminal ofthe first switching module 1428 (e.g., an analog switch), and the secondoutput terminal of the latch and step-down circuit 1427 is connected tothe input terminal of the output sub-circuit 1429. The output terminalof the latch circuit 1426 is connected to the control terminal of thefirst switching module 1428, and the fixed terminal of the firstswitching module 1428 is connected to the positive terminal of the powersupply of the output sub-circuit 1429. The VB1 is connected to thepositive terminal of the power supply of the latch circuit 1426, thepositive terminal of the power supply of the latch and step-down circuit1427, and the 0 selection terminal of the first switching module 1428.The VS1 is connected to the negative terminal of the power supply of thelatch circuit 1426, the negative terminal of the power supply of thelatch and step-down circuit 1427, and the negative terminal of the powersupply of the output sub-circuit 1429. The HO1 is connected to theoutput terminal of the output sub-circuit 1429.

The function of the first input sub-circuit 1421 is described asfollows:

at the rising edge of the signal at the input terminal of the firstinput sub-circuit 1421, the first output terminal of the first inputsub-circuit 1421 outputs a pulse signal with a pulse width of about 300ns; at the falling edge of the signal at the input terminal of the firstinput sub-circuit 1421, the second output terminal of the first inputsub-circuit 1421 outputs a pulse signal with a pulse width of about 300ns. When the control input terminal 12 of the first input sub-circuit1421 is connected with a high level, the third output terminal of thefirst input sub-circuit 1421 outputs a pulse signal with a pulse widthof about 300 ns.

The function of the latch circuit 1426 is described as follows:

when a low level signal is present at the input terminal of the latchcircuit 1426, the output terminal of the latch circuit 1426 outputs ahigh level, otherwise the output terminal of the latch circuit 1426outputs a low level.

The function of the latch and step-down circuit 1427 is described asfollows:

when a low level is present at the first input terminal of the latch andstep-down circuit 1427, the second output terminal of the latch andstep-down circuit 1427 continuously outputs a high level; and when a lowlevel is present at the second input terminal of the latch and step-downcircuit 1427, the first output terminal of the latch and step-downcircuit 1427 continuously outputs a low level. That is, the signal fromthe HIN1 is decomposed into two pulse signals at two output terminals ofthe first input sub-circuit 1421 which are re-integrated into a completesignal. In addition, the latch and step-down circuit 1427 has astep-down circuit inside, and the second output terminal of the latchand step-down circuit 1427 outputs a voltage of 15V for the VS1.

The function of the output sub-circuit 1429 is:

to output a signal having a voltage which is consistent with thepositive terminal of the power supply thereof when being connected witha high level or is consistent with the negative terminal of the powersupply thereof when being connected with a low level and having a phaseposition which is consistent with that of the HIN1.

Here, using a 300 ns narrow pulse signal to control the first switchtube 1422, the second switch tube 1423, and the third switch tube 1424is to shorten the conduction time for the first switch tube 1422, thesecond switch tube 1423, and the third switch tube 1424, therebyreducing respective power consumption.

Its working principle is described as follows:

after the signal from the HIN1 passes through the first inputsub-circuit 1421, the first output terminal and the second outputterminal of the first input sub-circuit 1421 output 300 ns narrow pulsesat the rising edge and the falling edge of the signal, respectively. Thenarrow pulses are configured to respectively control the first switchtube 1422 and the second switch tube 1423 to be turned on for 300 ns, sothat the first input terminal and the second input terminal of the latchand step-down circuit 1427 generate 300 ns low levels, respectively. Thelatch and step-down circuit 1427 has an RS trigger and other devicesinside, so that two low level signals are recombined into a completesignal having a phase same as the HIN1.

When the control input terminal 12 is connected with a low level, a highlevel pulse is not present at the third output terminal of the firstinput sub-circuit 1421, the third switch tube 1424 is not turned on, andthe low level is not present at the control input terminal 12 of thelatch circuit 1426, then the output terminal of the latch circuit 1426maintains at a low level. The positive terminal of the power supply ofthe output sub-circuit 1429 remains connected to the 0 selectionterminal of the first switching module 1428, i.e., connected to the VB1,such that the output sub-circuit 1429 outputs the high/low level in therange of 0 V to 20 V to adapt to the SiC device in the switch tube forgiving full play to its performance.

When the control input terminal 12 is connected with a high level, ahigh level pulse is present at the third output terminal of the firstinput sub-circuit 1421, the third switch tube 1424 is turned on for 300ns. The 300 ns low level is present at the control input terminal 12 ofthe latch circuit 1426, then the output terminal of the latch circuit1426 outputs a high level. The positive terminal of the power supply ofthe output sub-circuit 1429 is switched to be connected to the 1selection terminal of the first switching module 1428, i.e., connectedto the first output terminal of the latch and step-down circuit 1427,such that the output sub-circuit 1429 outputs the high/low level in therange of 0 V to 15 V to adapt to the Si device in the switch tube forgiving full play to its performance.

With reference to FIGS. 1 and 9, the VH driving circuit 144 is same asthe UH driving circuit 142; and the VH driving circuit 144 includes: afirst input sub-circuit 1441, a first switch tube 1442, a second switchtube 1443, a third switch tube 1444, and a first voltage outputsub-circuit 1445. The first input sub-circuit 1441 is connected to thecontrol input terminal 12. The first input sub-circuit 1441 includes afirst output terminal, a second output terminal and a third outputterminal. When the control input terminal 12 is connected with a lowlevel, the first output terminal and the second output terminal outputtrigger pulses; and when the control input terminal 12 is connected witha high level, the first output terminal, the second output terminal andthe third output terminal output trigger pulses.

The first switch tube 1442 is connected to the first output terminal,when the first output terminal outputs a trigger pulse, the first switchtube 1442 is turned on. The second switch tube 1443 is connected to thesecond output terminal, when the second output terminal outputs atrigger pulse, the second switch tube 1443 is turned on. The thirdswitch tube 1444 is connected to the third output terminal, when thethird output terminal outputs a trigger pulse, the third switch tube1444 is turned on.

The first voltage output sub-circuit 1445 is connected to the firstswitch tube 1442, a second switch tube 1443, and a third switch tube1444, respectively. When the control input terminal 12 is connected witha low level, a high level signal is not present at the third outputterminal of the first input sub-circuit 1441, the third switch tube 1444is not turned on, at which time the first voltage output sub-circuit1445 outputs the high/low level signal in the first voltage range. Whenthe control input terminal 12 is connected with a high level, a highlevel pulse is present at the third output terminal of the first inputsub-circuit 1441, the third switch tube 1444 is turned on for outputtingthe high/low level signal in the second voltage range.

Continue referring to FIG. 9, the first voltage output sub-circuit 1445includes: a latch circuit 1446, a latch and step-down circuit 1447 and afirst switching module 1448.

The latch and step-down circuit 1447 is connected to the first switchtube 1442 and the second switch tube 1443. The first switching module1448 is connected to the latch and step-down circuit 1447 and the powersupply, respectively. The latch circuit 1446 is connected to the thirdswitch tube 1444. The latch circuit 1446 is configured to control thefirst switching module 1448: when the third switch tube 1444 is notturned on, the latch circuit 1446 is configured to control an action ofthe first switching module 1448 to take a voltage of the power supply asan output voltage of the output sub-circuit 1449; and when the thirdswitch tube 1444 is turned on, the latch circuit 1446 is configured tocontrol an action of the first switching module 1448 to take an outputvoltage of the latch and step-down circuit 1447 as an output voltage ofthe output sub-circuit 1449.

As shown in FIG. 9, inside the VH driving circuit 144, the VCC isconnected to the positive terminal of the power supply of the firstinput sub-circuit 1441; the HIN2 is connected to the input terminal ofthe first input sub-circuit 1441; and the control input terminal 12 isconnected to the control terminal of the first input sub-circuit 1441.The first output terminal of the first input sub-circuit 1441 isconnected to the gate of the first switch tube (such as a high-voltageDMOS tube) 1442; the second output terminal of the first inputsub-circuit 1441 is connected to the gate of the second switch tube(such as a high-voltage DMOS tube) 1443; and the third output terminalof the first input sub-circuit 1441 is connected to the gate of thethird switch tube (such as a high-voltage DMOS tube) 1444. The GNDterminal is connected to the negative terminal of the power supply ofthe first input sub-circuit 1441, the substrate and the source of thefirst switch tube 1442, the substrate and the source of the secondswitch tube 1443, and the substrate and the source of the third switchtube 1444.

The drain of the first switch tube 1442 is connected to the first inputterminal of the latch and step-down circuit 1447, and the drain of thesecond switch tube 1443 is connected to the second input terminal of thelatch and step-down circuit 1447. The first output terminal of the latchand step-down circuit 1447 is connected to the 1 selection terminal ofthe first switching module 1448 (e.g., an analog switch), and the secondoutput terminal of the latch and step-down circuit 1447 is connected tothe input terminal of the output sub-circuit 1449. The output terminalof the latch circuit 1446 is connected to the control terminal of thefirst switching module 1448, and the fixed terminal of the firstswitching module 1448 is connected to the positive terminal of the powersupply of the output sub-circuit 1449. The VB2 is connected to thepositive terminal of the power supply of the latch circuit 1446, thepositive terminal of the power supply of the latch and step-down circuit1447, and the 0 selection terminal of the first switching module 1448.The VS2 is connected to the negative terminal of the power supply of thelatch circuit 1446, the negative terminal of the power supply of thelatch and step-down circuit 1447, and the negative terminal of the powersupply of the output sub-circuit 1449. The HO2 is connected to theoutput terminal of the output sub-circuit 1449.

The function of the first input sub-circuit 1441 is described asfollows:

at the rising edge of the signal at the input terminal of the firstinput sub-circuit 1441, the first output terminal of the first inputsub-circuit 1441 outputs a pulse signal with a pulse width of about 300ns; at the falling edge of the signal at the input terminal of the firstinput sub-circuit 1441, the second output terminal of the first inputsub-circuit 1441 outputs a pulse signal with a pulse width of about 300ns. When the control input terminal 12 of the first input sub-circuit1441 is connected with a high level, the third output terminal of thefirst input sub-circuit 1441 outputs a pulse signal with a pulse widthof about 300 ns.

The function of the latch circuit 1446 is described as follows:

when a low level signal is present at the input terminal of the latchcircuit 1446, the output terminal of the latch circuit 1446 outputs ahigh level, otherwise the output terminal of the latch circuit 1446outputs a low level.

The function of the latch and step-down circuit 1447 is described asfollows:

when a low level is present at the first input terminal of the latch andstep-down circuit 1447, the second output terminal of the latch andstep-down circuit 1447 continuously outputs a high level; and when a lowlevel is present at the second input terminal of the latch and step-downcircuit 1447, the first output terminal of the latch and step-downcircuit 1447 continuously outputs a low level. That is, the signal fromthe HIN2 is decomposed into two pulse signals at two output terminals ofthe first input sub-circuit 1441 which are re-integrated into a completesignal. In addition, the latch and step-down circuit 1447 has astep-down circuit inside, and the second output terminal of the latchand step-down circuit 1447 outputs a voltage of 15V for VS2.

The function of the output sub-circuit 1449 is:

to output a signal having a voltage which is consistent with thepositive terminal of the power supply thereof when being connected witha high level or is consistent with the negative terminal of the powersupply thereof when being connected with a low level and having a phaseposition which is consistent with that of the HIN2.

Here, using a 300 ns narrow pulse signal to control the first switchtube 1442, the second switch tube 1443, and the third switch tube 1444is to shorten the conduction time for the first switch tube 1442, thesecond switch tube 1443, and the third switch tube 1444, therebyreducing respective power consumption.

Its working principle is described as follows:

after the signal from HIN2 passes through the first input sub-circuit1441, the first output terminal and the second output terminal of thefirst input sub-circuit 1441 output 300 ns narrow pulses at the risingedge and the falling edge of the signal, respectively. The narrow pulsesare configured to respectively control the first switch tube 1442 andthe second switch tube 1443 to be turned on for 300 ns, so that thefirst input terminal and the second input terminal of the latch andstep-down circuit 1447 generate 300 ns low levels, respectively. Thelatch and step-down circuit 1447 has an RS trigger and other devicesinside, so that two low level signals are recombined into a completesignal having a phase same as the HIN2.

When the control input terminal 12 is connected with a low level, a highlevel pulse is not present at the third output terminal of the firstinput sub-circuit 1441, the third switch tube 1444 is not turned on, andthe low level is not present at the control input terminal 12 of thelatch circuit 1446, then the output terminal of the latch circuit 1446maintains at a low level. The positive terminal of the power supply ofthe output sub-circuit 1449 remains connected to the 0 selectionterminal of the first switching module 1448, i.e., connected to the VB2,such that the output sub-circuit 1449 outputs the high/low level in therange of 0 V to 20 V to adapt to the SiC device in the switch tube forgiving full play to its performance.

When the control input terminal 12 is connected with a high level, ahigh level pulse is present at the third output terminal of the firstinput sub-circuit 1441, the third switch tube 1444 is turned on for 300ns, and a 300 ns low level is present at the control input terminal 12of the latch circuit 1446, then the output terminal of the latch circuit1446 outputs a high level. The positive terminal of the power supply ofthe output sub-circuit 1449 is switched to be connected to the 1selection terminal of the first switching module 1448, i.e., connectedto the first output terminal of the latch and step-down circuit 1447,such that the output sub-circuit 1449 outputs the high/low level in therange of 0 V to 15 V to adapt to the Si device in the switch tube forgiving full play to its performance.

Its working principle is described as follows:

after the signal from the HIN2 passes through the first inputsub-circuit 1441, the first output terminal and the second outputterminal of the first input sub-circuit 1441 output 300 ns narrow pulsesat the rising edge and the falling edge of the signal, respectively. Thenarrow pulses are configured to respectively control the first switchtube 1442 and the second switch tube 1443 to be turned on for 300 ns, sothat the first input terminal and the second input terminal of the latchand step-down circuit 1447 generate 300 ns low levels, respectively. Thelatch and step-down circuit 1447 has an RS trigger and other devicesinside, so that two low level signals are recombined into a completesignal having a phase same as the HIN2.

When the switch tube includes a SiC MOS tube and the control inputterminal 12 is connected with a low level, a high level pulse is notpresent at the third output terminal of the first input sub-circuit1441, the third switch tube 1444 is not turned on, and the low level isnot present at the control input terminal 12 of the latch circuit 1446,then the output terminal of the latch circuit 1446 maintains at a lowlevel. The positive terminal of the power supply of the outputsub-circuit 1449 remains connected to the 0 selection terminal of thefirst switching module 1448, i.e., connected to the VB2, such that theoutput sub-circuit 1449 outputs the high/low level in the range of 0 Vto 20 V.

When the switch tube does not include a SiC MOS tube and the controlinput terminal 12 is connected with a high level, a high level pulse ispresent at the third output terminal of the first input sub-circuit1441, the third switch tube 1444 is turned on for 300 ns, and a 300 nslow level is present at the control input terminal 12 of the latchcircuit 1446, then the output terminal of the latch circuit 1446 outputsa high level. The positive terminal of the power supply of the outputsub-circuit 1449 is switched to be connected to the 1 selection terminalof the first switching module 1448, i.e., connected to the first outputterminal of the latch and step-down circuit 1447, such that the outputsub-circuit 1449 outputs the high/low level in the range of 0 V to 15 V.

With reference to FIGS. 1 and 10, the WH driving circuit 146 is same asthe UH driving circuit 142, the WH driving circuit 146 includes: a firstinput sub-circuit 1461, a first switch tube 1462, a second switch tube1463, a third switch tube 1464, and a first voltage output sub-circuit1465. The first input sub-circuit 1461 is connected to the control inputterminal 12. The first input sub-circuit 1461 includes a first outputterminal, a second output terminal and a third output terminal, whereinwhen the control input terminal 12 is connected with a low level, thefirst output terminal and the second output terminal output triggerpulses; and when the control input terminal 12 is connected with a highlevel, the first output terminal, the second output terminal and thethird output terminal output trigger pulses.

The first switch tube 1462 is connected to the first output terminal,when the first output terminal outputs a trigger pulse, the first switchtube 1462 is turned on. The second switch tube 1463 is connected to thesecond output terminal, when the second output terminal outputs atrigger pulse, the second switch tube 1463 is turned on. The thirdswitch tube 1464 is connected to the third output terminal, when thethird output terminal outputs a trigger pulse, the third switch tube1464 is turned on.

The first voltage output sub-circuit 1465 is connected to the firstswitch tube 1462, a second switch tube 1463 and a third switch tube1464, respectively. When the control input terminal 12 is connected witha low level, a high level is not present at the third output terminal ofthe first input sub-circuit 1461, the third switch tube 1464 is notturned on, at which time the first voltage output sub-circuit 1465outputs the high/low level signal in the first voltage range. When thecontrol input terminal 12 is connected with a high level, a high levelpulse is present at the third output terminal of the first inputsub-circuit 1461, the third switch tube 1464 is turned on for outputtingthe high/low level signal in the second voltage range.

Continue referring to FIG. 10, the first voltage output sub-circuit 1465includes: a latch circuit 1466, a latch and step-down circuit 1467 and afirst switching module 1468.

The latch and step-down circuit 1467 is connected to the first switchtube 1462 and the second switch tube 1463. The first switching module1468 is connected to the latch and step-down circuit 1467 and the powersupply, respectively. The latch circuit 1466 is connected to the thirdswitch tube 1464. The latch circuit 1466 is configured to control thefirst switching module 1468: when the third switch tube 1464 is notturned on, the latch circuit 1466 is configured to control an action ofthe first switching module 1468 to take a voltage of the power supply asan output voltage of the output sub-circuit 1469; and when the thirdswitch tube 1464 is turned on, the latch circuit 1466 is configured tocontrol an action of the first switching module 1468 to take an outputvoltage of the latch and step-down circuit 1467 as an output voltage ofthe output sub-circuit 1469.

As shown in FIG. 10, inside the WH driving circuit 146, the VCC isconnected to the positive terminal of the power supply of the firstinput sub-circuit 1461; the HIN3 is connected to the input terminal ofthe first input sub-circuit 1461; and the control input terminal 12 isconnected to the control terminal of the first input sub-circuit 1461.The first output terminal of the first input sub-circuit 1461 isconnected to the gate of the first switch tube (such as a high-voltageDMOS tube) 1462; the second output terminal of the first inputsub-circuit 1461 is connected to the gate of the second switch tube(such as a high-voltage DMOS tube) 1463; and the third output terminalof the first input sub-circuit 1461 is connected to the gate of thethird switch tube (such as a high-voltage DMOS tube) 1464. The GNDterminal is connected to the negative terminal of the power supply ofthe first input sub-circuit 1461, the substrate and the source of thefirst switch tube 1462, the substrate and the source of the secondswitch tube 1463, and the substrate and the source of the third switchtube 1464.

The drain of the first switch tube 1462 is connected to the first inputterminal of the latch and step-down circuit 1467, and the drain of thesecond switch tube 1463 is connected to the second input terminal of thelatch and step-down circuit 1467. The first output terminal of the latchand step-down circuit 1467 is connected to the 1 selection terminal ofthe first switching module 1468 (e.g., an analog switch), and the secondoutput terminal of the latch and step-down circuit 1467 is connected tothe input terminal of the output sub-circuit 1469. The output terminalof the latch circuit 1466 is connected to the control terminal of thefirst switching module 1468, and the fixed terminal of the firstswitching module 1468 is connected to the positive terminal of the powersupply of the output sub-circuit 1469. The VB3 is connected to thepositive terminal of the power supply of the latch circuit 1466, thepositive terminal of the power supply of the latch and step-down circuit1467, and the 0 selection terminal of the first switching module 1468.VS3 is connected to the negative terminal of the power supply of thelatch circuit 1466, the negative terminal of the power supply of thelatch and step-down circuit 1467, and the negative terminal of the powersupply of the output sub-circuit 1469. The HO3 is connected to theoutput terminal of the output sub-circuit 1469.

The function of the first input sub-circuit 1461 is described asfollows:

at the rising edge of the signal at the input terminal of the firstinput sub-circuit 1461, the first output terminal of the first inputsub-circuit 1461 outputs a pulse signal with a pulse width of about 300ns; at the falling edge of the signal at the input terminal of the firstinput sub-circuit 1461, the second output terminal of the first inputsub-circuit 1461 outputs a pulse signal with a pulse width of about 300ns. When the control input terminal 12 of the first input sub-circuit1461 is connected with a high level, the third output terminal of thefirst input sub-circuit 1461 outputs a pulse signal with a pulse widthof about 300 ns.

The function of the latch circuit 1466 is described as follows:

when a low level signal is present at the input terminal of the latchcircuit 1466, the output terminal of the latch circuit 1466 outputs ahigh level, otherwise the output terminal of the latch circuit 1466outputs a low level.

The function of the latch and step-down circuit 1467 is described asfollows:

when a low level is present at the first input terminal of the latch andstep-down circuit 1467, the second output terminal of the latch andstep-down circuit 1467 continuously outputs a high level; and when a lowlevel is present at the second input terminal of the latch and step-downcircuit 1467, the first output terminal of the latch and step-downcircuit 1467 continuously outputs a low level. That is, the signal fromthe HIN3 is decomposed into two pulse signals at two output terminals ofthe first input sub-circuit 1461 which are re-integrated into a completesignal. In addition, the latch and step-down circuit 1467 has astep-down circuit inside, and the second output terminal of the latchand step-down circuit 1467 outputs a voltage of 15V for the VS3.

The function of the output sub-circuit 1469 is:

to output a signal having a voltage which is consistent with thepositive terminal of the power supply thereof when being connected witha high level or is consistent with the negative terminal of the powersupply thereof when being connected with a low level and having a phaseposition which is consistent with that of the HIN3.

Here, using a 300 ns narrow pulse signal to control the first switchtube 1462, the second switch tube 1463, and the third switch tube 1464is to shorten the conduction time for the first switch tube 1462, thesecond switch tube 1463, and the third switch tube 1464, therebyreducing respective power consumption.

Its working principle is described as follows:

after the signal from the HIN3 passes through the first inputsub-circuit 1461, the first output terminal and the second outputterminal of the first input sub-circuit 1461 output 300 ns narrow pulsesat the rising edge and the falling edge of the signal, respectively. Thenarrow pulses are configured to respectively control the first switchtube 1462 and the second switch tube 1463 to be turned on for 300 ns, sothat the first input terminal and the second input terminal of the latchand step-down circuit 1467 generate 300 ns low levels, respectively. Thelatch and step-down circuit 1467 has an RS trigger and other devicesinside, so that two low level signals are recombined into a completesignal having a phase same as the HIN3.

When the control input terminal 12 is connected with a low level, a highlevel pulse is not present at the third output terminal of the firstinput sub-circuit 1461, the third switch tube 1464 is not turned on, andthe low level is not present at the control input terminal 12 of thelatch circuit 1466, then the output terminal of the latch circuit 1466maintains at a low level. The positive terminal of the power supply ofthe output sub-circuit 1469 remains connected to the 0 selectionterminal of the first switching module 1468, i.e., connected to the VB3,such that the output sub-circuit 1469 outputs the high/low level in therange of 0 V to 20 V to adapt to the SiC device in the switch tube forgiving full play to its performance.

When the control input terminal 12 is connected with a high level, ahigh level pulse is present at the third output terminal of the firstinput sub-circuit 1461, the third switch tube 1464 is turned on for 300ns, and a 300 ns low level is present at the control input terminal 12of the latch circuit 1466, then the output terminal of the latch circuit1466 outputs a high level. The positive terminal of the power supply ofthe output sub-circuit 1469 is switched to be connected to the 1selection terminal of the first switching module 1468, i.e., connectedto the first output terminal of the latch and step-down circuit 1467,such that the output sub-circuit 1469 outputs the high/low level in therange of 0 V to 15 V to adapt to the Si device in the switch tube forgiving full play to its performance.

Its working principle is described as follows:

after the signal from the HIN3 passes through the first inputsub-circuit 1461, the first output terminal and the second outputterminal of the first input sub-circuit 1461 output 300 ns narrow pulsesat the rising edge and the falling edge of the signal, respectively. Thenarrow pulses are configured to respectively control the first switchtube 1462 and the second switch tube 1463 to be turned on for 300 ns, sothat the first input terminal and the second input terminal of the latchand step-down circuit 1467 generate 300 ns low levels, respectively. Thelatch and step-down circuit 1467 has an RS trigger and other devicesinside, so that two low level signals are recombined into a completesignal having a phase same as the HIN3.

When the switch tube includes a SiC MOS tube and the control inputterminal 12 is connected with a low level, a high level pulse is notpresent at the third output terminal of the first input sub-circuit1461, the third switch tube 1464 is not turned on, and the low level isnot present at the control input terminal 12 of the latch circuit 1466,then the output terminal of the latch circuit 1466 maintains at a lowlevel. The positive terminal of the power supply of the outputsub-circuit 1469 remains connected to the 0 selection terminal of thefirst switching module 1468, i.e., connected to the VB3, such that theoutput sub-circuit 1469 outputs the high/low level in the range of 0 Vto 20 V.

When the switch tube does not include a SiC MOS tube and the controlinput terminal 12 is connected with a high level, a high level pulse ispresent at the third output terminal of the first input sub-circuit1461, the third switch tube 1464 is turned on for 300 ns, and a 300 nslow level is present at the control input terminal 12 of the latchcircuit 1466, then the output terminal of the latch circuit 1466 outputsa high level. The positive terminal of the power supply of the outputsub-circuit 1469 is switched to be connected to the 1 selection terminalof the first switching module 1468, i.e., connected to the first outputterminal of the latch and step-down circuit 1467, such that the outputsub-circuit 1469 outputs the high/low level in the range of 0 V to 15 V.

The structure of the UL/VL/WL driving circuit 162 is described below inconjunction with FIG. 11.

With reference to FIG. 11, the UL/VL/WL driving circuit 162 includes: asecond input sub-circuit 1621, a step-down sub-circuit 1622, and asecond voltage output sub-circuit 1623. The second input sub-circuit1621 includes a first output terminal, a second output terminal, a thirdoutput terminal and a fourth output terminal, wherein when the controlinput terminal 12 is connected with a low level, the second outputterminal, the third output terminal and the fourth output terminaloutput trigger pulses; and when the control input terminal 12 isconnected with a high level, the first output terminal, the secondoutput terminal, the third output terminal and the fourth outputterminal output trigger pulses. The step-down sub-circuit 1622 isconfigured to step-down a voltage of the power voltage to the secondvoltage range, that is, the output terminal of the step-down sub-circuit1622 outputs a voltage of 15 V for the GND terminal. The second voltageoutput sub-circuit 1623 is connected to the second input sub-circuit1621 and the step-down sub-circuit 1622, wherein when the second outputterminal, the third output terminal and the fourth output terminaloutput trigger pulses, the second voltage output sub-circuit 1623outputs the high/low level signal in the first voltage range; and whenthe first output terminal, the second output terminal, the third outputterminal and the fourth output terminal output trigger pulses, thesecond voltage output sub-circuit 1623 outputs the high/low level signalin the second voltage range.

Continue referring to FIG. 11, the second voltage output sub-circuit1623 includes: a UL output circuit 1624, a VL output circuit 1625 and aWL output circuit 1626 which are connected to the second outputterminal, the third output terminal and fourth output terminal of thesecond input sub-circuit 1621, respectively; and a second switchingmodule 1627, a third switching module 1628 and a fourth switching module1629 which are connected to the UL output circuit 1624, the VL outputcircuit 1625 and the WL output circuit 1626, respectively. The secondswitching module 1627, the third switching module 1628 and the fourthswitching module 1629 are configured to select a voltage of the powersupply or an output voltage of the step-down sub-circuit 1622 as anoutput voltage of the second voltage output sub-circuit according to thefirst output terminal of the second input sub-circuit 1621.

As shown in FIG. 11, inside the UL/VL/WL driving circuit 162, the VCC isconnected to a positive terminal of the power supply of the second inputsub-circuit 1621, a positive terminal of the power supply of thestep-down sub-circuit 1622, the 0 selection terminal of the secondswitching module (e.g., an analog switch) 1627, the 0 selection terminalof the third switching module (e.g., an analog switch) 1628, and the 0selection terminal of the fourth switching module (e.g., an analogswitch) 1629.

The LIN1 is connected to the first input terminal of the second inputsub-circuit 1621. The LIN2 is connected to the second input terminal ofthe second input sub-circuit 1621. The LIN3 is connected to the thirdinput terminal of the second input sub-circuit 1621. The control inputterminal 12 is connected to the control terminal of the second inputsub-circuit 1621.

The second output terminal of the second input sub-circuit 1621 isconnected to the input terminal of the UL output circuit 1624. The thirdoutput terminal of the second input sub-circuit 1621 is connected to theinput terminal of the VL output circuit 1625. The fourth output terminalof the second input sub-circuit 1621 is connected to the input terminalof the WL output circuit 1626. The first output terminal of the secondinput sub-circuit 1621 is connected to the control terminal of thesecond switching module 1627, the control terminal of the thirdswitching module 1628 and the control terminal of the fourth switchingmodule 1629, respectively.

The GND terminal is connected to a negative terminal of the power supplyof the second input sub-circuit 1621, a negative terminal of the powersupply of the step-down sub-circuit 1622, a negative terminal of thepower supply of the UL output circuit 1624, a negative terminal of thepower supply of the VL output circuit 1625, and a negative terminal ofthe power supply of the WL output circuit 1626. The output terminal ofthe step-down sub-circuit 1622 is connected to the 1 selection terminalof the second switching module 1627, the 1 selection terminal of thethird switching module 1628, and the 1 selection terminal of the fourthswitching module 1629, respectively. The LO1 is connected to the outputterminal of the UL output circuit 1624. The LO2 is connected to theoutput terminal of the VL output circuit 1625. The LO3 is connected tothe output terminal of the WL output circuit 1626.

The function of the second input sub-circuit 1621 is described asfollows:

the second output terminal of the second input sub-circuit 1621 outputsa signal same as that at the first input terminal of the second inputsub-circuit 1621; the third output terminal of the second inputsub-circuit 1621 outputs a signal same as that at the second inputterminal of the second input sub-circuit 1621; and the fourth outputterminal of the second input sub-circuit 1621 outputs a signal same asthat at the third input terminal of the second input sub-circuit 1621.When the input terminal of the second input sub-circuit 1621 isconnected with a high level, the first output terminal of the secondinput sub-circuit 1621 outputs the high level. When the input terminalof the second input sub-circuit 1621 is connected with a low level, thefirst output terminal of the second input sub-circuit 1621 outputs thelow level.

The function of the step-down sub-circuit 1622 is that the outputterminal of the step-down sub-circuit 1622 outputs a voltage of 15 V forthe GND terminal.

The function of the UL output circuit 1624 is: to output a signal havinga voltage which is consistent with the positive terminal of the powersupply thereof when being connected with a high level or is consistentwith the negative terminal of the power supply thereof when beingconnected with a low level and having a phase position which isconsistent with that of the LIN1.

The function of the VL output circuit 1625 is: to output a signal havinga voltage which is consistent with the positive terminal of the powersupply thereof when being connected with a high level or is consistentwith the negative terminal of the power supply thereof when beingconnected with a low level and having a phase position which isconsistent with that of the LIN2.

The function of the WL output circuit 1626 is: to output a signal havinga voltage which is consistent with the positive terminal of the powersupply thereof when being connected with a high level or is consistentwith the negative terminal of the power supply thereof when beingconnected with a low level and having a phase position which isconsistent with that of the LIN3.

Its working principle is described as follows:

After the signals from the LIN1, LIN2 and LIN3 pass through the secondinput sub-circuit 1621, the second output terminal, the third outputterminal and the fourth output terminal of the second input sub-circuit1621 output signals having a phase position same as that of the LIN1,LIN2 and LIN3 and a shaped square wave, respectively.

When the switch tube includes a SiC MOS tube and the control inputterminal 12 is connected with a low level, the first output terminal ofthe second input sub-circuit 1621 outputs the low level, the fixedterminal of the second switching module 1627 is connected to the 0selection terminal of the second switching module 1627; the fixedterminal of the third switching module 1628 is connected to the 0selection terminal of the third switching module 1628; and the fixedterminal of the fourth switching module 1629 is connected to the 0selection terminal of the fourth switching module 1629, so that the LO1outputs a signal of 0 V to 20 V having a phase same as that at the inputterminal of the UL output circuit 1624; the LO2 outputs a signal of 0 Vto 20 V having a phase same as that at the input terminal of the VLoutput circuit 1625; and the LO3 outputs a signal of 0 V to 20 V havinga phase same as that at the input terminal of the WL output circuit1626.

When the switch tube does not include a SiC MOS tube and the controlinput terminal 12 is connected with a high level, the first outputterminal of the second input sub-circuit 1621 outputs the high level,the fixed terminal of the second switching module 1627 is connected tothe 1 selection terminal of the second switching module 1627; the fixedterminal of the third switching module 1628 is connected to the 1selection terminal of the third switching module 1628; and the fixedterminal of the fourth switching module 1629 is connected to the 1selection terminal of the fourth switching module 1629, so that the LO1outputs a signal of 0 V to 15 V having a phase same as that at the inputterminal of the UL output circuit 1624; the LO2 outputs a signal of 0 Vto 15 V having a phase same as that at the input terminal of the VLoutput circuit 1625; and the LO3 outputs a signal of 0 V to 15 V havinga phase same as that at the input terminal of the WL output circuit1626.

The technical solutions according to the above embodiments of thepresent disclosure at least have the following technical effects oradvantages.

The voltage of the power supply for the power device 100 according tocertain embodiments of the present disclosure remains unchanged at 20 V,the peripheral circuit does not need to be modified, and the powerconsumption of the high voltage integrated circuit has not substantiallyincreased. The same high voltage integrated circuit is configured todrive both the SiC device and the Si device, such that the risk wherematerials are mixed is avoided in the production process, thusfacilitating material organization and reduction of material costs. Thevoltage used to drive the SiC device is 20 V and the voltage used todrive the Si device is 15 V, such that the respective conductionprocesses of the SiC device and the Si device both are in the fullconduction state with individual performances achieved.

With reference to FIG. 12, the present disclosure further provides inembodiments an electric appliance 1000, including a power device 100described above and a processor 200, the processor 200 is connected tothe power device 100. The electric appliance may be an air conditioner(including a household air conditioner, and a commercial airconditioner), a washing machine, a refrigerator, an induction cooker,etc., and the power device 100 can achieve the functions described inthe foregoing description.

The voltage of the power supply for the power device 100 in the electricappliance 1000 according to certain embodiments of the presentdisclosure remains unchanged at 20 V, the peripheral circuit does notneed to be modified, and the power consumption of the HVIC tube has notsubstantially increased. The same HVIC tube is configured to drive boththe SiC device and the Si device, such that the risk where materials aremixed is avoided in the production process, thus facilitating materialorganization and reduction of material costs. The voltage used to drivethe SiC device is 20 V and the voltage used to drive the Si device is 15V, such that the respective conduction processes of the SiC device andthe Si device both are in the full conduction state with individualperformances achieved.

In the present disclosure, unless specified or limited otherwise, astructure in which a first feature is “on” or “below” a second featuremay include an embodiment in which the first feature is in directcontact with the second feature, and may also include an embodiment inwhich the first feature and the second feature are not in direct contactwith each other, but are contacted via an additional feature formedtherebetween. Furthermore, a first feature “on”, “above” or “on top of”a second feature may include an embodiment in which the first feature isright or obliquely “on”, “above” or “on top of” the second feature, orjust means that the first feature is at a height higher than that of thesecond feature; while a first feature “below”, “under” or “on bottom of”a second feature may include an embodiment in which the first feature isright or obliquely “below”, “under” or “on bottom of” the secondfeature, or just means that the first feature is at a height lower thanthat of the second feature.

The disclosure herein provides many different embodiments or examplesfor realizing different structures of the present disclosure. In orderto simplify the present disclosure, the components and settings ofspecific examples are described herein. Of course, they are onlyexamples, and are not intended to limit the present disclosure. Inaddition, reference numerals and/or reference letters may be repeated indifferent examples in the present disclosure. Such repetition is for thepurpose of simplification and clarity, and does not indicate therelationship between the various embodiments and/or settings underdiscussion. In addition, the present disclosure provides examples ofvarious specific processes and materials, but those of ordinary skill inthe art may be aware of application of other processes and/or use ofother materials.

In the description of this specification, the description with referenceto the term such as “an embodiment”, “some embodiments”, “illustrativeembodiments”, “an example”, “a specific example” or “some examples”, andthe like refer to incorporation of the specific features, structures,materials or characteristics described in the embodiments or examples isincluded in at least one embodiment or example of the presentdisclosure. In this specification, the illustrative expression of theabove-mentioned term does not necessarily refer to the same embodimentor example. Moreover, the described specific features, structures,materials or characteristics can be combined in an appropriate manner inany one or more embodiments or examples.

Although the embodiments of the present disclosure have been shown anddescribed, those of ordinary skill in the art can understand thatvarious changes, modifications, substitutions, and alternative can bemade to these embodiments without departing from the principle andpurpose of the present disclosure. The scope of the present disclosureis defined by the claims and their equivalents.

What is claimed is:
 1. A power device comprising: a control inputterminal, an upper bridge arm switch tube and a lower bridge arm switchtube, a first driving circuit, connected to the control input terminaland configured to drive the upper bridge arm switch tube; and a seconddriving circuit, connected to the control input terminal and configuredto drive the lower bridge arm switch tube, wherein: the control inputterminal is connectable with a low level or a high level, when thecontrol input terminal is connected with the low level, the firstdriving circuit and the second driving circuit output a high/low levelsignal in a first voltage range, when the control input terminal isconnected with the high level, the first driving circuit and the seconddriving circuit output a high/low level signal in a second voltagerange, and the first voltage range is different from the second voltagerange.
 2. The power device according to claim 1, further comprising aGND terminal and a VCC terminal, when the control input terminal isconnected to the GND terminal through a bonding wire, the control inputterminal is connected with the low level, and when the control inputterminal is connected to the VCC terminal through a bonding wire, thecontrol input terminal is connected with the high level.
 3. The powerdevice according to claim 1, further comprising a controller, connectedto the control input terminal and configured to output the low level orthe high level.
 4. The power device according to claim 1, wherein thefirst voltage range is 0 V to 20 V, and the second voltage range is 0 Vto 15 V.
 5. The power device according to claim 1, wherein the firstdriving circuit comprises a UH driving circuit, a VH driving circuit anda WH driving circuit; the second driving circuit comprises a UL/VL/WLdriving circuit; the upper bridge arm switch tube comprises a firstupper bridge arm switch tube, a second upper bridge arm switch tube anda third upper bridge arm switch tube; the lower bridge arm switch tubecomprises a first lower bridge arm switch tube, a second lower bridgearm switch tube and a third lower bridge arm switch tube, wherein thecontrol input terminal is connected to each of the UH driving circuit,the VH driving circuit and the WH driving circuit, and the UH drivingcircuit, the VH driving circuit and the WH driving circuit areconfigured to drive the first upper bridge arm switch tube, the secondupper bridge arm switch tube and the third upper bridge arm switch tube,respectively; the UH driving circuit is connected to the first upperbridge arm switch tube, the VH driving circuit is connected to thesecond upper bridge arm switch tube, and the WH driving circuit isconnected to the third upper bridge arm switch tube; the control inputterminal is connected to the UL/VL/WL driving circuit, the UL/VL/WLdriving circuit is configured to drive the first lower bridge arm switchtube, the second lower bridge arm switch tube and the third lower bridgearm switch tube, and the UL/VL/WL driving circuit is connected to thefirst lower bridge arm switch tube, the second lower bridge arm switchtube and the third lower bridge arm switch tube.
 6. The power deviceaccording to claim 5, wherein: when the first upper bridge arm switchtube, the second upper bridge arm switch tube, the third upper bridgearm switch tube, the first lower bridge arm switch tube, the secondlower bridge arm switch tube and the third lower bridge arm switch tubeeach are a SiC device, the control input terminal is connected with thelow level; when the first upper bridge arm switch tube, the second upperbridge arm switch tube, the third upper bridge arm switch tube, thefirst lower bridge arm switch tube, the second lower bridge arm switchtube and the third lower bridge arm switch tube each are a Si device,the control input terminal is connected with the high level.
 7. Thepower device according to claim 6, wherein the UH driving circuit, theVH driving circuit, or the WH driving circuit comprises: a first inputsub-circuit, connected to the control input terminal and comprising afirst output terminal, a second output terminal and a third outputterminal, wherein: when the control input terminal is connected with thelow level, the first output terminal and the second output terminaloutput trigger pulses; and when the control input terminal is connectedwith the high level, the first output terminal, the second outputterminal and the third output terminal output trigger pulses; a firstswitch tube, a second switch tube and a third switch tube, wherein: thefirst switch tube is connected to the first output terminal, when thefirst output terminal outputs a trigger pulse, the first switch tube isturned on, the second switch tube is connected to the second outputterminal, when the second output terminal outputs a trigger pulse, thesecond switch tube is turned on, and the third switch tube is connectedto the third output terminal, when the third output terminal outputs atrigger pulse, the third switch tube is turned on; and a first voltageoutput sub-circuit, connected to the first switch tube, the secondswitch tube and the third switch tube, respectively, wherein: the firstvoltage output sub-circuit outputs the high/low level signal in thefirst voltage range when the first switch tube and the second switchtube are turned on and the third switch tube is not turned on, and thefirst voltage output sub-circuit outputs the high/low level signal inthe second voltage range when the first switch tube, the second switchtube and the third switch tube are turned on.
 8. The power deviceaccording to claim 7, wherein the first voltage output sub-circuitcomprises: a latch and step-down circuit, connected to the first switchtube and the second switch tube, a first switching module, connected tothe latch and step-down circuit and a power supply respectively, a latchcircuit, connected to the third switch tube, wherein: when the thirdswitch tube is not turned on, the latch circuit is configured to controlan action of the first switching module to take a voltage of the powersupply as an output voltage of the output sub-circuit; and when thethird switch tube is turned on, the latch circuit is configured tocontrol an action of the first switching module to take an outputvoltage of the latch and step-down circuit as an output voltage of theoutput sub-circuit.
 9. The power device according to claim 6, whereinthe UL/VL/WL driving circuit comprises: a second input sub-circuit,comprising a first output terminal, wherein: when the control inputterminal is connected with the low level, the first output terminal ofthe second input sub-circuit outputs a low level, and when the controlinput terminal is connected with the high level, the first outputterminal of the second input sub-circuit outputs a high level; astep-down sub-circuit, configured to step-down a voltage of a powersupply to the second voltage range; and a second voltage outputsub-circuit, connected to the second input sub-circuit and the step-downsub-circuit, wherein: when the first output terminal of the second inputsub-circuit outputs the low level, the second voltage output sub-circuitoutputs the high/low level signal in the first voltage range, and whenthe first output terminal of the second input sub-circuit outputs thehigh level, the second voltage output sub-circuit outputs the high/lowlevel signal in the second voltage range.
 10. The power device accordingto claim 9, wherein the second input sub-circuit comprises a secondoutput terminal, a third output terminal and a fourth output terminal,wherein the second voltage output sub-circuit comprises: a UL outputmodule, a VL output module and a WL output module, respectivelyconnected to the second output terminal, the third output terminal andfourth output terminal of the second input sub-circuit, and a secondswitching module, a third switching module and a fourth switchingmodule, respectively connected to the UL output module, the VL outputmodule and the WL output module, wherein the second switching module,the third switching module and the fourth switching module areconfigured to select the voltage of the power supply or an outputvoltage of the step-down sub-circuit as an output voltage of the secondvoltage output sub-circuit according to the first output terminal of thesecond input sub-circuit.
 11. An electric appliance, comprising a powerdevice and a processor connected to the power device, wherein the powerdevice comprises: a control input terminal; an upper bridge arm switchtube and a lower bridge arm switch tube; a first driving circuit,connected to the control input terminal and configured to drive theupper bridge arm switch tube; and a second driving circuit, connected tothe control input terminal and configured to drive the lower bridge armswitch tube; wherein: the control input terminal is connectable with ahigh level or a low level, when the control input terminal is connectedwith the low level, the first driving circuit and the second drivingcircuit output a high/low level signal in a first voltage range, whenthe control input terminal is connected with the high level, the firstdriving circuit and the second driving circuit output a high/low levelsignal in a second voltage range, and the first voltage range isdifferent from the second voltage range.
 12. The electric applianceaccording to claim 11, wherein the power device further comprises: a GNDterminal and a VCC terminal, wherein: when the control input terminal isconnected to the GND terminal through a bonding wire, the control inputterminal is connected with the low level, and when the control inputterminal is connected to the VCC terminal through a bonding wire, thecontrol input terminal is connected with the high level.
 13. Theelectric appliance according to claim 11, wherein the power devicecomprises a controller, wherein: the control input terminal is connectedto the controller, and the controller is configured to output the lowlevel or the high level.
 14. The electric appliance according to claim11, wherein the first voltage range is 0 V to 20 V, and the secondvoltage range is 0 V to 15 V.
 15. The electric appliance according toclaim 11, wherein: the first driving circuit comprises a UH drivingcircuit, a VH driving circuit and a WH driving circuit; the seconddriving circuit comprises a UL/VL/WL driving circuit; the upper bridgearm switch tube comprises a first upper bridge arm switch tube, a secondupper bridge arm switch tube and a third upper bridge arm switch tube;the lower bridge arm switch tube comprises a first lower bridge armswitch tube, a second lower bridge arm switch tube and a third lowerbridge arm switch tube, wherein: the control input terminal is connectedto each of the UH driving circuit, the VH driving circuit and the WHdriving circuit, and the UH driving circuit, the VH driving circuit andthe WH driving circuit are configured to drive the first upper bridgearm switch tube, the second upper bridge arm switch tube and the thirdupper bridge arm switch tube, respectively; the UH driving circuit isconnected to the first upper bridge arm switch tube, the VH drivingcircuit is connected to the second upper bridge arm switch tube, and theWH driving circuit is connected to the third upper bridge arm switchtube; and the control input terminal is connected to the UL/VL/WLdriving circuit, the UL/VL/WL driving circuit is configured to drive thefirst lower bridge arm switch tube, the second lower bridge arm switchtube and the third lower bridge arm switch tube, and the UL/VL/WLdriving circuit is connected to the first lower bridge arm switch tube,the second lower bridge arm switch tube and the third lower bridge armswitch tube.
 16. The electric appliance according to claim 15, wherein:when the first upper bridge arm switch tube, the second upper bridge armswitch tube, the third upper bridge arm switch tube, the first lowerbridge arm switch tube, the second lower bridge arm switch tube and thethird lower bridge arm switch tube each are a SiC device, the controlinput terminal is connected with the low level; and when the first upperbridge arm switch tube, the second upper bridge arm switch tube, thethird upper bridge arm switch tube, the first lower bridge arm switchtube, the second lower bridge arm switch tube and the third lower bridgearm switch tube each are a Si device, the control input terminal isconnected with the high level.
 17. The electric appliance according toclaim 16, wherein the UH driving circuit, the VH driving circuit, or theWH driving circuit comprises: a first input sub-circuit, connected tothe control input terminal and comprising a first output terminal, asecond output terminal and a third output terminal, wherein: when thecontrol input terminal is connected with the low level, the first outputterminal and the second output terminal output trigger pulses; and whenthe control input terminal is connected with the high level, the firstoutput terminal, the second output terminal and the third outputterminal output trigger pulses; a first switch tube, a second switchtube and a third switch tube, wherein: the first switch tube isconnected to the first output terminal, when the first output terminaloutputs a trigger pulse, the first switch tube is turned on, the secondswitch tube is connected to the second output terminal, when the secondoutput terminal outputs a trigger pulse, the second switch tube isturned on, and the third switch tube is connected to the third outputterminal, when the third output terminal outputs a trigger pulse, thethird switch tube is turned on; and a first voltage output sub-circuit,connected to the first switch tube, the second switch tube and the thirdswitch tube, respectively, wherein: the first voltage output sub-circuitoutputs the high/low level signal in the first voltage range when thefirst switch tube and the second switch tube are turned on and the thirdswitch tube is not turned on, and the first voltage output sub-circuitoutputs the high/low level signal in the second voltage range when thefirst switch tube, the second switch tube and the third switch tube areturned on.
 18. The electric appliance according to claim 17, wherein thefirst voltage output sub-circuit comprises: a latch and step-downcircuit, connected to the first switch tube and the second switch tube,a first switching module, connected to the latch and step-down circuitand a power supply respectively, and a latch circuit, connected to thethird switch tube, wherein: when the third switch tube is not turned on,the latch circuit is configured to control an action of the firstswitching module to take a voltage of the power supply as an outputvoltage of the output sub-circuit; and when the third switch tube isturned on, the latch circuit is configured to control an action of thefirst switching module to take an output voltage of the latch andstep-down circuit as an output voltage of the output sub-circuit. 19.The electric appliance according to claim 16, wherein the UL/VL/WLdriving circuit comprises: a second input sub-circuit, comprising afirst output terminal, wherein: when the control input terminal isconnected with the low level, the first output terminal of the secondinput sub-circuit outputs a low level, and when the control inputterminal is connected with the high level, the first output terminal ofthe second input sub-circuit outputs a high level; a step-downsub-circuit, configured to step-down a voltage of the power supply tothe second voltage range; and a second voltage output sub-circuit,connected to the second input sub-circuit and the step-down sub-circuit,wherein: when the first output terminal of the second input sub-circuitoutputs the low level, the second voltage output sub-circuit outputs thehigh/low level signal in the first voltage range, and when the firstoutput terminal of the second input sub-circuit outputs the high level,the second voltage output sub-circuit outputs the high/low level signalin the second voltage range.
 20. The electric appliance according toclaim 19, wherein the second input sub-circuit comprises a second outputterminal, a third output terminal and a fourth output terminal, whereinthe second voltage output sub-circuit comprises: a UL output module, aVL output module and a WL output module, respectively connected to thesecond output terminal, the third output terminal and fourth outputterminal of the second input sub-circuit, a second switching module, athird switching module and a fourth switching module, respectivelyconnected to the UL output module, the VL output module and the WLoutput module, wherein the second switching module, the third switchingmodule and the fourth switching module are configured to select thevoltage of the power supply or an output voltage of the step-downsub-circuit as an output voltage of the second voltage outputsub-circuit according to the first output terminal of the second inputsub-circuit. the processor is connected to the power device.